Tube-number record

TBL12/25

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ClassRF Power Triode

Construction

Primary TypeTriode

Envelope

Glass/Metal

SectionsSingle

Filament / Heater

MaterialThoriated tungsten

Absolute Maximum Ratings

Plate Voltage12000 V

Plate Dissipation15000 W

Audio Performance

Key Features

Air cooled
Directly heated
Thoriated tungsten filament
Industrial RF use

Typical Operation

Mode	Plate V	Gm (µmhos)	Rp (Ω)	µ	Plate mA
RF Class C Oscillator	12000 V	20000	1700	34	3200 mA
RF Class C Oscillator	10000 V	—	—	—	3200 mA
RF Class C Oscillator	8000 V	—	—	—	3200 mA

Application Notes

To ensure a uniform RF current distribution in the grid seal especially at frequencies higher than 4 MHz, the grid lead should be connected specifically as indicated in technical drawings.

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